Automatic fluid-actuated peed meckinism for percussive tools



PATENTED AUG. 25, 1908. D.. S. WAUGH.

AUTOMAHG FLUID AGTUATED FEED MEGHANISM POR PERCUSSIVB TOOLS.

APPLICATION FILED JULY 20,1906.

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D. s. WAUGH. JOUTOTvr/TTTO FLUID AOTUATBD TEBO MEOHANISM TOR PBROUSSTVETOOLS.

APPLICATION FILED JULY 20, 1906.

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TVT T m w Y UNITEU srn'rns ran OF DENVER, COLORADO, ASSIG'NOR TO THEILER ROOK DRILL MANU- FACTURING COMPAN Y', OF DENVER., COLORADO.

DANIEL S. WAUGH,

irren AUTOMATIC FLUID-ACTUATED FEED MECH'LNISM FOR PERCSSIVE TOOLS.

Speeicaton of Letters Patent.

Patented Aug. 25, 1908.

Application filed July 20, 1906. Serial No. 327,019.

T o all whom it may concern:

Be it knownthat I, DANIEL S. VVAUGH, a citizenv of the United States,residing in the city and countyof Denver and State of Colorado,haveinvented certain new and useful Improvements in AutomaticFluid-Actuated Feed Mechanism for Percussive Tools; and I do declare thefollowing to be a'full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same, reference being had to the accompanying drawings,and to the letters and figures of reference marked thereon, which form apart ofthis specification.

My invention relates to fluid actuated mechanism for percussive'toolsbeing more especially intended for tliose of the hammer class, whetherof the larger variety usually termed drills or of the small class'generally termed tools. By virtue of my improvement the operating fluidfor the tool also performs the feeding function whereby the body of thedrill is automatically moved forward longitudinally to hold the bit orcutting device in contact with the material to be penetrated. Thisfeeding function is performed simultaneously with the operation of -thedrill and the iiuid for operating the drill and per* ining the feedingfunction, is supplied from a common source. The mechanism is providedwith a conduit through which the o erating fluid enters and in which ahollow s ank upon which the body of the tool is mounted telescopes. Theconduit is mounted Iupon a supporting column to have both a longitudinaland swinging adjustment. By virtue of this swinging adjustment, thedrilli may be so positioned as to 'drill a considerable number of holes inthe breast of the rock without changing the longitudinal vposition ofthe mechanism upon the column.4

Having -briefiy outlined my im roved construction, I will vproceed todescri ethe same in detail reference being made to the accompanyingdrawing in which is illustrated an embodiment thereof.A

In' this drawing, Figure 1 is a longitudinal section taken through themain conduit and the'hellowshank which telescopes therein. In this viewthe drill body connected -with the said shank is not illustrated. Thisview may also be said to be a section taken on the in a differentposition. Fig.. 2 is an elevation partly in section showing the drillbody' and a portion of the hollow shank with which it is connected, thelatter being shown in section. Fig. 3 is a section taken on the line 3-3Fig. 1. Fig. 4 is a cross section taken on the line '4 4 Fig. 1,theparts being shown on a larger scale. Fig. 5 is a detail View of thetwo-part ball which is clamped to the conduit in which the hollow shanktelescopes. Fig 6 is an elevation illustrating 'the manner of operatinga tool equipped with my improvements.

The same reference characters indicate the same parts in all the views.

Let the immoral 5 designate the supporting column which may'be mountedin the usualp manner. To this column is secured a lateral extension 6 towhich is' clamped a sleeve 7 composed of two parts S and 9. Formedintegral with the part 9 is a clamping member 1() to which is,hinged asshown at 12, the other clamping member 13. Upon a lug 15 of the clampingmember .10 is pivotally connected a fastening bolt 1.4 which when theclamping members are locked' in the clamping position, engages a slottedlug 16 formed on the member 13. The clamping members 10 and 1 3,surround a ball or spherical member 17 composed of two parts clamped tothe conduit 18.' By virtue -of this arrangement there is a universaljoint connection between the column 5 and the conduit 1S, thus making itpracticable to swing this conduit together with its telescoping shankand the drill body, both upwardly and downwardly as well as in adirection passing around thecolunin, within a considerable range ofmovement.

To what .I will term the rear ythe conduit 18, is secured a couplinghead 19 extremity ofl provided with an inlet port 20 with which a Yflexible tube 21 may be connected for introducing the actuating iiuid.Through an extension 22 of the coupling 19, passes a journal 23 forminga part of a rod 24 whose body portion is angular, preferably cruciformin cross section (see Figs. 3 and 4).- To the outer extremity of thejournal 23, is secured a holder 25 through which is passed the bar 26 ofa hand crank 27. This bar is adjustable in the holder by means'ofasetbolt 2S. Mounted to telescope in the conduit 18 is a hollow shank 29 inwhose rearward extreme ity is inserted a plug 30 whose exterior isslightly cone-shaped to fit the hollow shank the rod 24 whereby thebodyof the drill may Vwhich is correspondingly fashioned for thepurpose.This plug 30 is held in place from the rear by means of a screw plug 3lthreaded into the shank and provided with a gasket 32 which forms afluid tight joint between the hollow shank and the main conduit. Theplugs 30 and 31 are apertured to receive the rod 24, the openings in theplugs being so shaped that the turning of the rod-24 also rotates theshank 29 within the conduit. The construction is also such that thehollow shank is allowed to slide longitudinally on be forced forwardlywhen in operation. To the forward extremity of the hollow shank 29 isconnected the body of the drill or tool 38, the said body portionhavingan interiorly threaded socket 34 in which the rear extremity ofthe shankis threaded. The rear extremity 35 of the drill casing isprovided with a port 36 communicating with the hollow conduit, for thepurpose of admitting operating fluid to the body of the casing F3 of thetool. This port 86 is controlled byavalve 37.

Thevplugs 30 and 3l are provided withan orifice 38 through which theoperating fluid passes from the main conduit 18, into the hollow shank29 behind the plug 30. -Thus when the tool is in operation, the hollowshank 29 is filled with the operating fluid which acts to drive theshank together with the rlrill body forwardly until the bit 39 engagesthe breast of the rock or the bottom of the hole in which the -drill bitis working. The operating fluid after leaving the port 20, enters achamber 40 i'n the rear of the plug 31 and at the same time passesthrough the orifice S8 into the hollow shank.

The forward extremity of the cruciform red 24 isprovided with a head 24Ain the rear of which is placed a rubber buffer 24B. This head and bufferform a stop which engage the plug member 3U and limit the forwardmovement of the shank and drill body whereby the shank is prevented fromescaping from the hollow conduit in which it tele-- scopes.

Having thus described my invention,what I claim is:

l, In automatic feed mechanism for percussive tools, the combination ofa main fluid conduit, a hollow shank telescoping therein, therearwardextremity of the shank being provided with a plug, means for deliveringoperating fluid to the rearward extremity of the conduit, the plug ofthe -hollow shank being provided with an orifice for the passa e offluid, a guide rod sup orted by said p ug and passing into the hol owshank and provided with a stop at its 'forward extremity to limit theforward movement of the shank, a tool casing connected with the, shank,the said casing being in communication with the fluid passing throughthe hollow shank.

2. In apparatus of the class described, the combination of a hollowconduit, a shank mounted to reciprocate in said conduit, a

tool casing connected with the forward extremity of the shank andmovable therewith, the rear extremity of the shank being provided with aplug, a guide rod passing .through the'said plug and provided with astop at its forward extremity to limit the forward movement of the shankand casing, a suitable support for said rod carried by said conduit, therear extremity ofthe rod protruding from the conduit and being journaledin said support, and means connected with the said rod to permitrotation ofthe shank and its connections, the rod where' it passesthrough the plug of the shank being constructed to cause the shank androd to rotate in unison.

In testimony whereof I affix my signature in presence of two witnesses.

DANIEL S. WAUGH. I/Vitnesses DENA NELSON, A. J. OBRIEN.

